it's been nearly a month since the sandy hook elementary shooting and in that time the gun control debate in this country has been stirred up. susan mcginnis starts us off in washington with more. susan, good morning to you. >> good morning, terrell. the aim of the vice president's task force is to build consensus on curbing gun violence, but it seems that advocates on both sides of the issue are digging in. in tucson, arizona, residents rang bells to mark the second anniversary of the shooting spree that killed six people and also wounded former congresswoman gabrielle giffords. but nearby the nation's gun control debate played out in public. a city councilman who supports stricter gun laws offered gift cards in exchange for guns. >> whether it's working or not, bring it in and we'll properly dispose of it. >> meanwhile in a nearby parking lot, it was transformed into a marketplace for firearms. >> anyone here with anything decent that shoots is going to get good fair offers and cash in hand. >> the competing gun purchase program and the memorial ceremony coincided with a strong statemen